Many-body effects in praesodymium core-level spectroscopies of PrO/sub 2/

Journal Article · Mon Aug 15 00:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

OSTI ID:7127625

Kotani, A; Okada, K; Giorgi, R; Gargano, A; Marcelli, A; Miyahara, T

The high-energy deep-core-level spectra of PrO/sub 2/ have been studied. Pr 3d x-ray photoemission spectroscopy (XPS), Pr M/sub 4,5/ x-ray-absorption spectroscopy (XAS) and Pr L/sub 3/ XAS show many-body effects. The data are analyzed in the framework of the filled-band Anderson-impurity model. Starting from the many-body description of the ground-state, the final states of each core-level spectroscopy are predicted. The effective relaxation energy in the final state decreases going from 3d XPS to L/sub 3/ XAS to M/sub 4,5/ XAS because of the repulsive interaction between the excited electron and the 4f electron in XAS spectra. It is shown that the ground state exhibits mixing of many-body configurations 4f/sup 1/ and 4f/sup 2/L, where L denotes a hole in the oxygen 2p-derived valence band, separated by the energy ..delta..E = 0.5 eV. A nonzero probability of the occupation of the 4f/sup 2/L configuration, giving a noninteger 4f count n/sub f/ = 1.6, is found.

• Research Organization: Dipartimento di Fisica, Universita degli Studi di Roma ''La Sapienza,'' 00185 Roma, Italy
• OSTI ID: 7127625
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 38:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PRASEODYMIUM OXIDES
ELECTRONIC STRUCTURE
PHOTOELECTRON SPECTROSCOPY
ABSORPTION SPECTROSCOPY
COVALENCE
ENERGY LEVELS
GROUND STATES
IMPURITIES
MANY-BODY PROBLEM
POLYCRYSTALS
POWDERS
SYNCHROTRON RADIATION
X RADIATION
BREMSSTRAHLUNG
CHALCOGENIDES
CRYSTALS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
IONIZING RADIATIONS
OXIDES
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
RADIATIONS
RARE EARTH COMPOUNDS
SPECTROSCOPY
360204* - Ceramics
Cermets
& Refractories- Physical Properties